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Finding the Fourth Proportional to 417.40, 572.65 and 406.62

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Solution

The fourth proportional to 417.40, 572.65 and 406.62 is: 557.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.40 : 572.65 = 406.62 : x
  2. Step 2: Convert to fraction form
    417.40/572.65 = 406.62/x
  3. Step 3: Cross multiply
    417.40x = 572.65 × 406.62
  4. Step 4: Simplify right side
    417.40x = 232,849.93
  5. Step 5: Solve for x
    x = 232,849.93/417.40
  6. Step 6: Final answer
    x = 557.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.